Hi, I have an arduino UNO, when I try to upload a sketch it fails as it does not see the com port, device manager see UNO when it is plugged in. The previous sketch is still operational but no matter what I try I cannot upload a new sketch, could the previous sketch get stuck in a loop and hog the com port. Would installing a new chip with boot loader installed resolve the issue?Thanks David

Hi, I have an arduino UNO, when I try to upload a sketch it fails as it does not see the com port, device manager see UNO when it is plugged in. The previous sketch is still operational but no matter what I try I cannot upload a new sketch, could the previous sketch get stuck in a loop and hog the com port. Would installing a new chip with boot loader installed resolve the issue?Thanks David

Hi Did you ever move your ATmega chip from the socket and put it on again? if you do, check the orientation . ATmega label is upsidedown relative to Arduino board (took me one morning of my life ). Open a arduino photo from web it will help you